What is the result? Would the result be different if Lone Star had tendered delivery at 8:00 am on the morning of the wedding?

Murphy contracts to purchase six cases of French champagne from Lone Star Liquors for $2,600. The contract states that delivery is to be made at the Murphy residence "on or before June 1, to be used for daughter's wedding reception on the afternoon of June 2. At 6:00 am on June 2, Murphy discovers the non-delivery. Feeling panicky, by 7:30 am Murphy had purchased the champagne from another dealer, paying a $500 premium for the lack of notice. That afternoon, just before the wedding reception, Lone Star tenders delivery of the champagne, ready to serve, at Murphy's residence. Murphy refuses tender, and Lone Star sues for breach of contract.